Re: [MBONED] Benjamin Kaduk's Discuss on draft-ietf-mboned-ieee802-mcast-problems-11: (with DISCUSS and COMMENT)
Benjamin Kaduk <kaduk@mit.edu> Mon, 26 October 2020 20:39 UTC
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Date: Mon, 26 Oct 2020 13:39:37 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: draft-ietf-mboned-ieee802-mcast-problems@ietf.org, evyncke@cisco.com
Cc: mboned@ietf.org, mboned-chairs@ietf.org, The IESG <iesg@ietf.org>, Alvaro Retana <aretana.ietf@gmail.com>
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Subject: Re: [MBONED] Benjamin Kaduk's Discuss on draft-ietf-mboned-ieee802-mcast-problems-11: (with DISCUSS and COMMENT)
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I see that the -12 was posted, but it still refers to the obsolete RFC 4601 (so I can't clear my Discuss yet). -Ben On Thu, Jan 09, 2020 at 08:48:34AM -0800, Benjamin Kaduk wrote: > On Thu, Jan 09, 2020 at 05:51:13AM -0800, Alvaro Retana wrote: > > On January 8, 2020 at 5:20:00 PM, Benjamin Kaduk via Datatracker wrote: > > > > Hi! > > > > > ---------------------------------------------------------------------- > > > DISCUSS: > > > ---------------------------------------------------------------------- > > > > > > Section 9 says that "[RFC4601], for instance, mandates the use of IPsec > > > to ensure authentication of the link-local messages in the Protocol > > > Independent Multicast - Sparse Mode (PIM-SM) routing protocol" but I > > > could not find where such use of IPsec was mandated. (I do recognize > > > that a similar statement appears almost verbatim in RFC 5796, but RFC > > > 5796 seems focused on extending PIM-SM to support ESP in additon to the > > > AH usage that was the main focus of the RFC 4601 descriptions, and does > > > not help clarify the RFC 4601 requirements for me.) The closest I found > > > was in Section 6.3.1 of RFC 4601: "The network administrator defines an > > > SA and SPI that are to be used to authenticate all link-local PIM > > > protocol messages (Hello, Join/Prune, and Assert) on each link in a PIM > > > domain" but I do not think that applies to all usage of PIM-SM. Am I > > > missing something obvious? > > > > It looks like everyone (including me) missed the nit that rfc4601 has > > been Obsoleted by rfc7761. One of the changes between the two is that > > rfc7761 removed the requirement for authentication using IPSec "due to > > lack of sufficient implementation and deployment experience". > > I think Roman did pick up on the obsoletion, but it was buried in the nits > at the end of his ballot position. > > As you rightly note, this does supersede my specific objection to this > document (though I still would like to know which part of RFC 4601 made > this requirement, if only to know whether or not to file an erratum on > 5796). > > > This is what rfc7761 says about authentication: > > > > 6.3. Authentication > > > > This document refers to RFC 5796 [8], which specifies mechanisms to > > authenticate PIM-SM link-local messages using the IPsec Encapsulating > > Security Payload (ESP) or (optionally) the Authentication Header > > (AH). It also points out that non-link-local PIM-SM messages (i.e., > > Register and Register-Stop messages) can be secured by a normal > > unicast IPsec Security Association (SA) between two communicants. > > And that seems like a good treatment of the situation. > > Thanks, > > Ben >
- [MBONED] Benjamin Kaduk's Discuss on draft-ietf-m… Benjamin Kaduk via Datatracker
- Re: [MBONED] Benjamin Kaduk's Discuss on draft-ie… Alvaro Retana
- Re: [MBONED] Benjamin Kaduk's Discuss on draft-ie… Benjamin Kaduk
- Re: [MBONED] Benjamin Kaduk's Discuss on draft-ie… William Atwood
- Re: [MBONED] Benjamin Kaduk's Discuss on draft-ie… Benjamin Kaduk
- Re: [MBONED] Benjamin Kaduk's Discuss on draft-ie… Michael McBride
- Re: [MBONED] Benjamin Kaduk's Discuss on draft-ie… Benjamin Kaduk